Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3872
Título: Operational modal monitoring of ancient structures using wireless technology
Autor: Aguilar, Rafael
Ramos, Luis
Lourenço, Paulo
Severino, Ricardo
Gomes, Ricardo
Sousa, Paulo Gandra de
Alves, Mário
Tovar, Eduardo
Data: 2009
Editora: Springer
Relatório da Série N.º: Dynamics of Civil Structures. Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4
Resumo: Operational Modal Analysis is currently applied in structural dynamic monitoring studies using conventional wired based sensors and data acquisition platforms. This approach, however, becomes inadequate in cases where the tests are performed in ancient structures with esthetic concerns or in others, where the use of wires greatly impacts the monitoring system cost and creates difficulties in the maintenance and deployment of data acquisition platforms. In these cases, the use of sensor platforms based on wireless and MEMS would clearly benefit these applications. This work presents a first attempt to apply this wireless technology to the structural monitoring of historical masonry constructions in the context of operational modal analysis. Commercial WSN platforms were used to study one laboratory specimen and one of the structural elements of a XV century building in Portugal. Results showed that in comparison to the conventional wired sensors, wireless platforms have poor performance in respect to the acceleration time series recorded and the detection of modal shapes. However, for frequency detection issues, reliable results were obtained, especially when random excitation was used as noise source.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3872
ISBN: 978-1-4419-9830-9
Versão do Editor: http://link.springer.com/chapter/10.1007/978-1-4419-9831-6_26
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